Fix atomic non-32-bit cmpxchg on aarch64

2026-02-01 14:32:26 +00:00 · 2019-12-09 19:21:21 -08:00 · 2019-12-09 19:21:21 -08:00 · f2833e4762
commit f2833e4762
parent 1b172c15b6
1 changed files with 5 additions and 0 deletions
--- a/jit/gadgets-aarch64/misc.S
+++ b/jit/gadgets-aarch64/misc.S
@ -53,6 +53,11 @@
        mov w9, eax
        do_add sub, w9, w8, \s
        setf_zsp \s, val=w9
+        .ifnb \s
+            cmp w9, 0
+            and w9, eax, (-1 << \size)
+            orr w8, w8, w9
+        .endif
        csel eax, w8, eax, ne
        csel w8, _tmp, w8, eq
        cset w9, eq